If you’ve ever watched Claude Code sprint confidently in the wrong direction, you’re not alone. 🛑 In April 2026, the secret to elite output isn't a complex prompt; it's the specific habits used by the man who built it, Boris Cherny. We are breaking down the "Boris Method"—from the mandatory 80% Plan Mode rule to the CLAUDE.md pruning habit—that separates "Vibe Coders" from professional engineers.

We’ll talk about:

• The 80% Plan Mode Rule: Why Boris starts almost every session with Shift + Tab (twice). Entering read-only mode allows Claude to research your "Intricacies" and "Intensities" without modifying a single file.
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